Quote Originally Posted by Rabid Koala View Post
I put a cooler in mine a year ago, it was one of the best things that I have done for my XC. It would occasionally downshift roughly when hot, with the cooler that problem has been eliminated. I'm sure that it will add substantially to the life of the transmission. I have been doing a Gibbons (pump out) flush every two years since I got the car, too.
Yep, had a Hayden cooler in my '02 for the last 8 years. Original transmission still works great.